Written by
Clara Bennett Appliance Care EditorPublished September 3, 2026Updated October 20, 2026
Content status:
Verified
Error codeFOOD PROBE (PT4)
ApplianceBlast Chiller
Quick answer
FOOD PROBE (PT4) is the failure alarm for insert probe core 4; the manual says to call service.
Model compatibility: U-Line reuses codes across series and model years, so FOOD PROBE (PT4) may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Insert probe core 4 failure. Call service.
FOOD PROBE (PT4) explained
This is the failure alarm for insert probe core 4, the last of the four cores. The manual says call service.
Models
Look for it on the UCBF432, UCBF532, UCBF632, UCBF559 and UCBF659 with the touch screen controller.
HIGH PRESSURE is a different alarm about head pressure.
Service for your Los Angeles blast chiller
When the display shows PT4, call (310) 879-5776 from Los Angeles. We ask for the model and what you already did. Read about our refrigeration repair as well.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your U-Line appliance?
Book a specialist visit for a clear estimate and approval before any repair.
U-Line products are compact, built-in, and often visually similar across generations. Effective repair starts with the exact model, the symptom you can…
